The activities that contain hidden water usage are:
- growing cotton to make fabric - Cotton production requires significant amounts of water for irrigation.
- growing cattle feed - Producing feed for cattle also involves substantial water usage, especially for crops like alfalfa and corn that are commonly used.
- processing and dying fabric - The textile industry uses a large amount of water not only for dyeing fabrics but also in various processing stages.
Washing dishes and drinking water generally do not fall under "hidden" water usage, as they are more obvious and direct uses of water.